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 <h1>预定义接口和类</h1>
<h2>目录</h2><ul class="chunklist chunklist_part"><li><a href="class.traversable.html">Traversable</a></li><li><a href="class.iterator.html">Iterator</a></li><li><a href="class.iteratoraggregate.html">IteratorAggregate</a></li><li><a href="class.internaliterator.html">InternalIterator</a></li><li><a href="class.throwable.html">Throwable</a></li><li><a href="class.arrayaccess.html">ArrayAccess</a></li><li><a href="class.serializable.html">Serializable</a></li><li><a href="class.closure.html">Closure</a></li><li><a href="class.stdclass.html">stdClass</a></li><li><a href="class.generator.html">Generator</a></li><li><a href="class.fiber.html">Fiber</a></li><li><a href="class.weakreference.html">WeakReference</a></li><li><a href="class.weakmap.html">WeakMap</a></li><li><a href="class.stringable.html">Stringable</a></li><li><a href="class.unitenum.html">UnitEnum</a></li><li><a href="class.backedenum.html">BackedEnum</a></li></ul>


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   参见 <a href="spl.interfaces.html" class="link">SPL 接口</a> 和  <a href="reserved.classes.html" class="link">预定义类</a>。
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